Sawing-milz



UNITED STATES PATENT QFFICE.

DEAN S. HOVAItD, OF LYONSDALE, NEW YORK.

SAWINGr-MILL.

Specification of Letters Patent No. 13,573, dated September 18, 1855.

To aZZ 'whom it 'may concern:

Be it known that I, DEAN S. HOWARD, of Lyonsdale, in the county of Lewisand State of New York, have invented certain new and useful Improvementsin Sawmills; and I do hereby declare that the following is a full,clear, and exact description thereof, reference being had to theaccompanying drawing, forming part of this specification, in whichFigure l, is a plan of the mill. Fig. 2,

a transverse section on the line m, of Fig. l. Fig. 3, is a frontelevation. Fig. 4, is a side view of one of the setter blocks, on anenlarged scale. Fig. 5, is a face view of the same, in two positions onthe inclined plane, same scale as Fig. 4.

The same letters of reference occurring in different figures, indicatecorresponding parts.

My invention consists in the manner of setting the log forward anyrequired distance, at either or both ends of the ways, by mechanicaldevices operated by the weight of the log; also in the method of hangingand operating the saw, so as to cut from either end of the log the sameway of the grain, the aXis of the saw being above the log when cuttingfrom one end, and beneath it when cutting from the other.

In describing the construction and operation of my mill, I will refer tothe drawing, in which- (A) represents the carriage, which has alongitudinal motion on the rail, or ways (a) this motion is communicatedto it through the pinion (Z2) on a vertical shaft, in which is auniversal joint (c) to allow of its being moved from side to side, togear into the rack ([Z) to propel the carriage in one direction, or intothe rack ((Z) to propel it in the contrary direction.

(B) is a set of gearing, on two shafts, for varying the speed of thecarriage, or amount of feed given to the saw; the wheels of which areunited inpairs as (a a a a) and (0 c om) with two single wheels (i i),which are all free to revolve on their respective shafts, until securedby one of the clutches (e e e e e) which slide on leathers inserted inthe shaft, and cause it to revolve at the speed of the wheel soclutched; the clutch (6) being represented in gear, all the others outof gear. On the carriage are attached two setter blocks (L), at suitabledistance apart to support the log (C) to be sawed. By referring to Figs.4 and 5, the construction and operation of these setter blocks, will bemore clearly seen.

(f) is the foundation secured to the carrlage in any convenient manner,having four vertical racks (g), one at each corner, over which the baseframe slides; on the upper side of this frame (h) is fitted the verticalpiece (la), whose base (/c) has a sliding motion in a dovetail groove,transversely to the carriage, and is constructed with two verticalsliding dogs (n) projecting from its face, which may be moved up ordown, by pinions gearing into racks on their edges, so that when the log(C) is laid upon the base frame (h), these dogs secure it above andbelow; the underside of the frame (ZL) has a friction roller (Z)attached to it, hanging downward between the ways (a), in such position,that that, on one of the setter blocks shall pass over the inclined ways(m), while that on the other comes in Contact with and passes over theinclines these inclines are attached by bolts or pivots to the framingthat supports the ways (a) at one end, and rest on movable supports (o)at the other, when elevated; they are so situated that the frictionroller (Z) under each of the setter blocks, shall ascend theirrespective inclines, immediately after a board has been severed' fromthe log, and during the passage of the end of the log by the saw, thedistance of its diameter; thus elevating the setter blocks and with themthe log to any given height, which may be regulated by the pitch of theincline; during its rise the elbow lever (p) which is attached at itsangle by a link or jointed rod (g) to the under side of the frame (ZL),and at one of its arms by a bracket (1") and link (r) to the foundation(f), changes its position and assumes that represented in red lines inFig. 4, the vertical arm slipping one or more notches in the under sideof the base (Q) of the sliding vertical piece (Z0), according to theheight it is raised by the pitch of the inclined plane; when at the topof which, the roller (Z) comes in contact with the suplocked in -anotchfurther back in the underside of the base (c) than that occupied by itbefore rising, and thus carries the log forward the thickness of theboard to be out; both of the setter blocks operating as abovesimultaneously; two parallel shafts with their axes in the ends of theframe (7L) and a spur wheel (s) on each end of each, gearing into eachYother, and into the vertical racks (g) at each corner of the foundation(f), insure its rising and lowering level; after the inclined planes aretripped the Inotion of the carriage is reversed, by throwing the pinion(o) out of gear with the rack (d) and into that marked (CZ), and as soonas the setter block has returned past the center (Z) on which theinclined plane is hung, the inner end of said plane being weighted; orborne down by a spring, raises the other end onto the support (o), readyfor a repetition of the same operation on the return of the carriage; asimilar arrangement of the inclined planes is made under each of thesetter blocks, at each end of their travel back and forth.

The circular saw (D) is hung on its axis in the frame (E which isbalanced on the countershaft F), the band (G) passing around the pulley(H) on the counter shaft, and that (I) on the saw spindle communicatesthe motion to the saw. The saw is so hung that its position may bechanged from that shown in the drawing, to that represented by dottedlines in Fig. 8, without varying the tension of the belt, and isretained in either of these positions by the catches (u u) on the elbowlevers (3, 4.) locking it above or below; this change of position, iseffected during the time the setter blocks are rising the inclinedplanes, by a projection (o) on the side of the carriage, coming incontact with the vertical arm of the elbow lever (fw), (which has itsfulcrum on the frame work at (l), its other arm being connected by thelink or rod to the vibrating frame The moment the cat-ch (u) has beenwithdrawn from its hold on the frame, by the cam on the carriage,passing over the friction roller (m) on the horizontal arm of the elbowlever (3), and thus depressing it; the carriage continuing forward, theprojection (fu) carries the vertical arm of the elbow lever, and wit-hit the vibrating frame to which its other arm is attached, into theposition represented by dotted lines, when it is supported by the catchon the vertical arm of the elbow lever (4L), until the return of thecarriage, when a similar cam near the other end passes over a frictionroller on its horizontal arm, and removes this catch, when theprojection (2) carries the elbow lever (w) and vibrating frame (E) backinto their original position, in readiness to resume its cut at theother end of the log.

On the outer end of the shaft is a pulley (M) and belt (N), throughwhich the saw is put in motion from the steam engine, or otherpropelling machinery. The feed gear may be operated by the shaft andbevel gearing (P) direct from the engine shaft, or by band and pulleysas most convenient.

Having thus described my invention, what I claim therein as new anddesire to secure by Letters Patent'is 1. The method of setting the logforward, after each board is severed, by mechanical devices operated bythe weight of the log, substantially as specified.

2. The method herein described of cutting from either end of the log,with a circular saw, by hanging the saw in a vibrating frame, or itsequivalent, so that the axis of the saw may be above the log whencutting from o-ne end, and beneath it when cutting from the other end,so as to cut either way against the grain of the wood.

3. I wish to be understood that I claim the selfsetting arrangementherein described, and claimed, whether in connection with the circularsaw, or the single or double edged reciprocating saw, as equallyapplicable to either.

In testimony whereof, I have hereunto subscribed my name this 23d day ofApril D. S. HOWARD. Witnesses:

J. B. ROCHE, WM. M. SMITH.

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